Details Title: 314 review Description: exam 2 Total Flash Cards: 17 Created: 04/13/2009 21:27:05		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Agriculture Flashcards
Cards in this set: Term what statements are true about various gastric systems?   Definition -Ruminant animals have a 4 chambered stomach and have cellulose producing microbes in their rumens. -Equines (horses) have a large cecum that facilities nutrient and water absorption from cellulose Term Which statements are true about herbivores?   Definition -Large grazing animals do not themselves produce the enzyme required to digest the cellulose that comprises the bulk of structural carbohydrates of forages. -Only a few species of microbes produce the enzyme cellulase, which is required to digest the cellulose found in forages. Term which statements are true about the effect of grazing on grasses? Definition -removal of photosynthetic tissue reduces a plants ability to assimilate energy. -Grazing reduces the amount of total leaf area, alters the age of remaining plant leaves, and modifies the photosynthetic rate per unit area. Term Definition Term What are the effects of grazing on resource allocation in grasses Definition -Defoliation results in reduced total leaf area but an increased percentage of energy allocation to leaves. -The allocation of photosynthetic energy is unaffected by any intensity of defoliation. Term What are the plant responses to grazing due to Biochemical Avoidance? Definition Contribut to plant defense rather than primary metabolism Term What are the plant responses of grazing due to Tolerance? Definition Physiological mechanisms that increase growth after grazing Term What are the plant responses to grazing due to Mechanical Avoidance? Definition Leaf spines or thorns Term What are the plant responses to grazing due to Secondary Compounds? Definition Chemical compounds that deter herbivores Term What are the plant responses to grazing due to Compensatory photosynthesis? Definition Leaves of defoliated plants display greater rates of photosynthesis than nondefoliated plants Term Compensatory plant growth in grass plants refers to their accelerated growth rate following defoliation is a true or false statement about compensatory plant growth? Definition TRUE Term Removal of photosynthetic tissues reduces a plant's ability to assimilate solar energy is a true or false statement about the effect of grazing on the growth of grass plants? Definition TRUE Term Ruminants have a symbiotic relationship with microbes that exist in the rumen and that produce cellulase that catalyzes the break down cellulose is a true or false statement about cellulose and its consumption by ruminants? Definition TRUE Term The phytomer is that modular unit of organization in grass plants and consists of what? Definition A node, internode, leaf sheath, leaf blade, and axillary bud Term What is a tiller? Definition An individual grass shoot Term What is the total number of Animal Unit Years that the herd represents? Definition 700 Term What are factors for when calculating the appropriate average stocking rate for a given operation? Definition -Total acreage of the land being managed -Forage demand, which is determined by the types and classes of animals being produced, and the period for which they graze -Distance of grazing resources from water and variation in slope on the land being managed